នាម៖
Anna
គោត្តនាម៖
Schuler
The use of courtyard, roof, road surface, slope, etc. as catchments to collect rainwater for underground water storage for future supply of cropland irrigation as well as drinking water for humans and livestock.
មិនមានការពណ៌នាទេ។
Solar stoves use solar energy for cooking, featuring environmental-friendly, zero pollution, low cost, easy operation and maintenance, safe and convenient use, saving firewood, etc. To operate the stove, adjust condenser aiming at the sun with the spot on stove or other objects to be heated.
